Backlight module and display device

ABSTRACT

A backlight module includes: a plurality of lamp groups arranged in an array on a base substrate, each lamp group comprises a plurality of mini light emitting diodes, a plurality of lead wires in the lamp group, an external anode and an external cathode; a plurality of anode wires and cathode wires electrically connected to external anodes and external cathodes of a plurality of rows of lamp groups, respectively, wherein in at least some of the plurality of cathode wires, one same cathode wire is electrically connected to the external cathodes of the lamp groups located in different rows. Same-type anode wires comprise a plurality of anode wires to which same-wire lamp groups are connected, and orthographic projections of the same-type anode wires on the base substrate do not overlap with an orthographic projection of one same lead wire in the lamp group on the base substrate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Section 371 National Stage Application ofInternational Application No. PCT/CN2021/110590 filed on Aug. 4, 2021,which claims benefit of Chinese Patent Application No. 202011069930.4filed on Sep. 30, 2020 in the State Intellectual Property Office ofChina, the disclosure of which is hereby incorporated in its entirety byreference./

TECHNICAL FIELD

The present disclosure relates to a field of display technology, and inparticular, to a backlight module and a display device.

BACKGROUND

Light Emitting Diode (LED) technology has been developed for nearly 30years, and its application range has been expanded continuously. Forexample, the light emitting diode may be applied in a display field as abacklight of a display device or as an LED display screen. With adevelopment of technology, Mini Light Emitting Diode (Mini LED) hasgradually become a research hotspot in the field of display technology.For example, the Mini LED may be used in a backlight module of a liquidcrystal display device as a light emitting element of the backlightmodule. In this way, by utilizing advantages of the Mini LED, thebacklight module may achieve advantages of divisional dimming, fastresponse, simple structure, long service life, and the like.

The above information disclosed in this section is only for anunderstanding of the background of the inventive concept of the presentdisclosure. Therefore, the above information may contain informationthat does not constitute the prior art.

SUMMARY

The present disclosure provides a signal receiving apparatus and method.A reference pulse signal in an optical pulse.

BRIEF DESCRIPTION OF DRAWINGS

Other objectives and advantages of the present disclosure will beapparent through the following descriptions of the present disclosurewith reference to the accompanying drawings, which may facilitate acomprehensive understanding of the present disclosure.

FIG. 1 is a schematic plan view of a lamp group according to someexemplary embodiments of the present disclosure.

FIG. 2 is a schematic diagram of a backlight module according to someexemplary embodiments of the present disclosure, wherein an arrayarrangement of lamp groups in the backlight module is schematicallyshown.

FIG. 3 is a partial enlarged view of a backlight module according tosome exemplary embodiments of the present disclosure, wherein apositional relationship of a lamp group, anode wires and cathode wiresis schematically shown.

FIG. 4 schematically shows a connection of same-wire lamp groups withanode wires and cathode wires.

FIG. 5 is a schematic diagram of a plurality of regions of a basesubstrate included in a backlight module according to some exemplaryembodiments of the present disclosure.

FIG. 6 is a partial enlarged view of a backlight module according tosome exemplary embodiments of the present disclosure.

FIG. 7A, FIG. 7B, and FIG. 7C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively, wherein the anode wire falls into a first region.

FIG. 8A, FIG. 8B, and FIG. 8C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively, wherein the anode wire falls into a second region.

FIG. 9A, FIG. 9B, and FIG. 9C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively, wherein the anode wire falls into a third region.

FIG. 10A, FIG. 10B, and FIG. 10C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively, wherein the anode wire falls into a third region.

FIG. 11 schematically shows that no parasitic capacitance is formedbetween same-type anode wires.

FIG. 12 is a partial enlarged view of a backlight module according tosome exemplary embodiments of the present disclosure.

It should be noted that, for clarity, sizes of layers, structures orregions in the accompanying drawings used to describe the embodiments ofthe present disclosure may be exaggerated or reduced, i.e., theaccompanying drawings are not drawn to actual scale.

DETAILED DESCRIPTION

In the following descriptions, for purposes of explanation, numerousspecific details are set forth in order to provide a comprehensiveunderstanding of various exemplary embodiments. However, it is obviousthat the various exemplary embodiments may be implemented without thesespecific details or with one or more equivalent arrangements. In otherinstances, well-known structures and devices are shown in block diagramform in order to avoid unnecessarily obscuring the various exemplaryembodiments. Moreover, the various exemplary embodiments may bedifferent, but are not necessarily exclusive. For example, particularshapes, configurations and characteristics of an exemplary embodimentmay be used or implemented in another exemplary embodiment withoutdeparting from the inventive concept.

In the drawings, sizes and relative sizes of elements may be exaggeratedfor clarity and/or purpose of description. As such, the sizes andrelative sizes of each element are not necessarily limited to thoseshown in the drawings. While exemplary embodiments may be implementeddifferently, a specific process sequence may be performed differentlyfrom a described sequence. For example, two consecutively describedprocesses may be performed substantially simultaneously or in an orderreverse to the order described. In addition, the same reference numeralsindicate the same elements.

When an element is described as being “on”, “connected to” or “coupledto” another element, the element may be directly on, connected orcoupled to the another element or an intervening element may be present.However, when an element is described as being “directly on”, “directlyconnected to” or “directly coupled to” another element, there is nointervening element. Other terms and/or expressions used to describe arelationship between elements should be interpreted in a similar manner,such as, “between . . . and” versus “directly between . . . and”,“adjacent” versus “directly adjacent” or “on” versus “directly on”, etc.Moreover, the term “connection” may refer to a physical connection, anelectrical connection, a communication connection, and/or a fluidconnection. Furthermore, X, Y, and Z axes are not limited to three axesof a rectangular coordinate system, and may be interpreted in a broadersense. For example, X, Y, and Z axes may be perpendicular to each other,or may represent different directions that are not perpendicular to eachother. For purposes of the present disclosure, “at least one of X, Y andZ” and “at least one selected from a group consisting of X, Y and Z” maybe interpreted as X only, Y only, Z only, or any combination of two ormore of X, Y and Z, such as XYZ, XY, YZ and XZ. As used herein, the term“and/or” includes any and all combinations of one or more of relateditems listed.

It should be understood that, although the terms first, second, etc. maybe used here to describe various elements, these elements should not belimited by these terms. These terms are only used to distinguish oneelement from another. For example, without departing from the scope ofexemplary embodiments, a first element could be referred as a secondelement, and, similarly, a second element could be referred a firstelement.

Herein, expressions “wiring”, “wire”, “lead wire” and the like mayinclude a conductive wire formed of a conductive material, which isusually an opaque material, such as a metal conductive material such asCu.

Herein, an inorganic light emitting diode refers to a light emittingelement made of an inorganic material, wherein LED means an inorganiclight emitting element different from OLED. Specifically, the inorganiclight emitting element may include a mini light emitting diode (MiniLED) and a micro light emitting diode (Micro LED). The mini lightemitting diode (i.e., Mini LED) refers to a small light emitting diodewith a grain size between the Micro LED and a traditional LED.Generally, a grain size of the Mini LED may be between 100 and 300microns.

A plurality of Mini LEDs are arranged in an array, every N Mini LEDsform a region, and brightness of different regions may be controlled byan integrated circuit. When the plurality of Mini LEDs arranged in anarray are used as a backlight module of a passive display panel, apicture contrast of a liquid crystal display device, for example, may besignificantly improved, thereby improving a picture quality.

The Mini LED backlight module includes a plurality of mini LEDs arrangedin an array. The plurality of mini LEDs are divided into a plurality oflamp groups. FIG. 1 is a schematic plan view of a lamp group accordingto some exemplary embodiments of the present disclosure. As shown inFIG. 1 , a lamp group 10 may include a plurality of mini LED lamp beads1. For example, in the embodiment shown in FIG. 1 , one lamp group 10includes 9 mini LED lamp beads 1, and the 9 mini LED lamp beads 1 arearranged in an array of 3 rows and 3 columns. It should be noted thatthe number and the array arrangement here are only exemplary, and theembodiments of the present disclosure are not limited this. In otherembodiments, one lamp group 10 may include a smaller number or a largernumber of mini LED lamp beads 1. Moreover, a connection mode of theplurality of mini LED lamp beads 1 included in the one lamp group 10 mayalso be in other forms. In addition, the plurality of mini LED lampbeads 1 may also be arranged in an array in other ways.

Continuing to refer to FIG. 1 , each lamp bead 1 may include a positiveelectrode 11 and a negative electrode 12. In the embodiment shown inFIG. 1 , nine lamp beads 1 may be sequentially electrically connected inseries. For example, a negative electrode 12 of a previous lamp bead 1is electrically connected to a positive electrode 11 of a latter lampbead 1 through a lead wire, a positive electrode 11 of a head lamp bead1 is electrically connected to an anode wire, and a negative electrode11 of a tail lamp bead 1 is electrically connected to a cathode wire.

In the present disclosure, for ease of description, an anode in a lampgroup electrically connected to the anode wire is referred as anexternal anode, which is denoted by reference numeral 2; a cathode in alamp group electrically connected to the cathode wire is referred as anexternal cathode, which is denoted by reference numeral 3; lead wires ina lamp group for electrically connect each mini LED lamp bead in seriesare referred as lead wires in the lamp group, which are denoted byreference numerals 4.

Thus, in the present disclosure, unless otherwise specified, theexpression “lamp group” refers to a light emitting unit formed by aplurality of mini LED lamp beads connected electrically in series, andone lamp group may include: a plurality of mini LED lamp beads 1, aplurality of lead wires 4 configured to electrically connect a pluralityof mini LED lamp beads in series, an external anode 2, and an externalcathode 3.

For example, one lamp group may include a plurality of mini LED lampbeads arranged in a p*q matrix, wherein p and q are both natural numbersgreater than or equal to 2. For example, in the embodiment shown in FIG.1 , p=3, and q=3. In other embodiments, p may not be equal to q.

One lamp group includes (p*q−1) lead wires 4 in the lamp group. Forexample, in the embodiment shown in FIG. 1 , one lamp group includeseight lead wires 4 in the lamp group, which are used to electricallyconnect the nine mini LED lamp beads in series.

In the present disclosure, unless otherwise specified, the expression“anode wire” refers to a signal wire for transmitting an anode voltagesignal to the external anode of the lamp group; the expression “cathodewire” refers to a signal wire for transmitting a cathode voltage signal(e.g., GND signal) to the external cathode of the lamp group.

It should be noted that a rectangular frame is used to represent themini LED lamp bead in FIG. 1 , but it may be understood that the miniLED lamp bead in the embodiments of the present disclosure is notlimited to a rectangle, and may have other shapes such as a circle, apolygon or other shapes.

FIG. 2 is a schematic diagram of a backlight module according to someexemplary embodiments of the present disclosure, wherein an arrayarrangement of lamp groups in the backlight module is schematicallyshown. As shown in FIG. 2 , the backlight module may include a pluralityof lamp groups 10. The plurality of lamp groups 10 may be arranged on abase substrate SUB in a matrix of m*n, i.e., arranged on the basesubstrate SUB in a matrix of m rows and n columns. For example, the basesubstrate SUB may be a glass substrate. A Mini LED backlight productbased on the glass substrate has advantages of low cost, large-scaleproduction, large size and the like.

An external anode 2 and an external cathode 3 of each lamp group 10 areelectrically connected to an anode wire A and a cathode wire K,respectively. FIG. 2 only shows an anode wire A7 and a cathode wire K1.For example, the backlight module may further include an integratedcircuit 7. One end of the anode wire A is electrically connected to theintegrated circuit 7, and the other end of the anode wire A iselectrically connected to the external anode 2 of the lamp group 10. Oneend of the cathode wire K is electrically connected to the externalcathode 3 of the lamp group 10, and the other end of the cathode wire Kis electrically connected to the integrated circuit 7. In this way, ananode signal and a cathode signal output by the integrated circuit 7 maybe respectively transmitted to the external anode 2 and external cathode3 of the lamp group 10, such that a light emission of the lamp group 10may be controlled.

As shown in FIG. 2 , an electrical connection between the lamp group 10located in the 7th row and the 1st column and the integrated circuit 7is schematically shown. For example, the lamp group 10 located in the7th row and the 1st column may be electrically connected to theintegrated circuit 7 through the anode wire A7 (i.e., the seventh anodewire) and the cathode wire K1 (i.e., the first cathode wire).

In the Mini LED backlight module, the number of lamp groups 10 isrelatively large. In the embodiments of the present disclosure, a methodof time-division multiplexing of cathode wire may be used to reduce thenumber of cathode wires, thereby reducing a difficulty of arrangingwiring. That is, one cathode wire may be electrically connected to aplurality of rows of lamp groups 10, and cathode signals may be providedto the plurality of rows of lamp groups 10 by means of time-divisionmultiplexing.

FIG. 3 is a partial enlarged view of a backlight module according tosome exemplary embodiments of the present disclosure, wherein apositional relationship of a lamp group, anode wires and cathode wiresis schematically shown. FIG. 4 schematically shows a connection ofsame-wire lamp groups with anode wires and cathode wires. In theembodiments of the present disclosure, the plurality of lamp groups 10in FIG. 2 may be grouped. For example, in the embodiment of FIG. 2 , mrows of lamp groups 10 are provided; considering a driving capability ofthe integrated circuit 7, the number of cathode wires that theintegrated circuit 7 may provide is M. In this case, the m rows of lampgroups 10 may be divided into N groups, and N is a rounded up valueobtained by dividing m by M.

For example, in the embodiment of FIG. 2 , 24 rows of lamp groups 10 areprovided, that is, m=24; the number of cathode wires that the integratedcircuit 7 may provide is 6, that is, M=6. In this way, the 24 rows oflamp groups 10 may be divided into 4 (24/6) groups.

As shown in FIG. 3 , 6 cathode wires are provided, which are denoted asK1, K2, K3, K4, K5 and K6, respectively; and 24 anode wires areprovided, which are denoted as A1 to A24, respectively. In theembodiment of FIG. 3 , the 6 cathode wires are centrally arranged on aside of the base substrate. The embodiments of the present disclosureare not limited to this, and the 6 cathode wires may also be uniformlydistributed on the base substrate.

For example, 4 rows of lamp groups distributed equidistantly in a columndirection may be connected to one cathode wire simultaneously. As shownin FIG. 3 , lamp groups L1, L7, L13 and L19 are connected to the samecathode wire K1. The lamp groups L1, L7, L13, and L19 respectivelyrepresent the lamp groups 10 on the 1st, 7th, 13th, and 19th rows. Bysuch analogy, lamp groups L2, L8, L14, and L20 are connected to the samecathode wire K2.

External cathodes of lamp groups L1 to L6 are respectively electricallyconnected to cathode wires K1 to K6. By such analogy, external cathodesof lamp groups L7 to L12 are respectively electrically connected to thecathode wires K1 to K6.

Lamp groups L1 to L24 are respectively electrically connected to theanode wires A1 to A24, that is, the anode wires are not multiplexed.

In the present disclosure, for ease of description, a plurality of lampgroups (or a plurality of rows of lamp groups) electrically connected toone same cathode wire are referred as “same-wire lamp groups”, and anodewires to which each lamp group in the “same-wire lamp group” isconnected to are referred to as “same-type anode wires”. That is, theexpression “same-wire lamp groups” refers to a plurality of lamp groups(or a plurality of rows of lamp groups) electrically connected to onesame cathode wire, and the expression “same-type anode wires” refers toa plurality of anode wires to which a plurality of lamp groups (or aplurality of rows of lamp groups) electrically connected to the samecathode wire are connected. The expression “same-group anode wires”refers to a plurality of anode wires located in one same region, and thelamp groups to which these anode wires are connected are electricallyconnected to different cathode wires. For example, referring to FIG. 2and FIG. 3 , the lamp groups L1, L7, L13 and L19 may be referred to asthe “same-wire lamp groups”, the anode wires A1, A7, A13 and A19 may bereferred to as the “same-type anode wires”, and the anode wires A1 to A6may be referred to as the “same-group anode wires”.

FIG. 5 is a schematic diagram of a plurality of regions of a basesubstrate included in a backlight module according to some exemplaryembodiments of the present disclosure. FIG. 6 is a partial enlarged viewof a backlight module according to some exemplary embodiments of thepresent disclosure. Referring to FIG. 4 , FIG. 5 and FIG. 6 incombination, in the embodiments of the present disclosure, the backlightmodule includes: a base substrate SUB; a plurality of lamp groups 10provided on the base substrate, wherein the plurality of lamps arearranged in an array on the base substrate, and each lamp group includesa plurality of mini light emitting diodes 1, a plurality of lead wires 2in the lamp group, an external anode 3 and an external cathode 4, andthe plurality of lead wires 2 in the lamp group are used to electricallyconnect the plurality of mini light emitting diodes 1 in series; aplurality of anode wires A1 to A24 respectively electrically connectedto external anodes of a plurality of rows of lamp groups; and aplurality of cathode wires K1 to K6 respectively electrically connectedto external cathodes of the plurality of rows of lamp groups, wherein inat least some of the plurality of cathode wires, one same cathode wireis electrically connected to the external cathodes of the lamp groupslocated in different rows so as to provide, by means of time-divisionmultiplexing, cathode signals to the lamp groups located in differentrows; and same-wire lamp groups include a plurality of lamp groupselectrically connected to one same cathode wire, same-type anode wiresinclude a plurality of anode wires to which the same-wire lamp groupsare connected, and orthographic projections of the same-type anode wireson the base substrate do not overlap with an orthographic projection ofone same lead wire in the lamp group on the base substrate.

Continuing to refer to FIG. 5 and FIG. 6 , the plurality of cathodewires K1 to K6 are arranged at intervals, the base substrate includes aplurality of regions, and any two adjacent regions in the plurality ofregions, for example, a region {circle around (1)}, a region {circlearound (2)}, a region {circle around (3)}, and a region {circle around(4)} as shown in FIG. 5 are spaced apart by an orthographic projectionof at least one cathode wire on the base substrate.

In the embodiments of the present disclosure, orthographic projectionsof the same-type anode wires on the base substrate are located indifferent regions of the plurality of regions, respectively. Forexample, the same-type anode wires A1, A7, A13, and A19 are located inthe region {circle around (1)}, the region {circle around (2)}, theregion {circle around (3)}, and the region {circle around (4)},respectively.

The plurality of anode wires A1 to A24 include a plurality of groups ofanode wires, and orthographic projections of a plurality of anode wiresin each group of anode wires on the base substrate fall within one sameregion of the plurality of regions. For example, in the embodiment shownin FIG. 6 , four groups of anode wires are provided, which are a firstgroup of anode wires A19 to A24, a second group of anode wires A13 toA18, a third group of anode wires A7 to A12, and a fourth group of anodewires A1 to A6. A plurality of lamp groups, to which each group of anodewires is connected, are respectively electrically connected to differentcathode wires.

For example, the plurality of lamp groups are arranged in an array of mrows and n columns on the base substrate SUB. A number of the pluralityof cathode wires is M, a number of the plurality of anode wires is m, anumber of the plurality of groups of anode wires is N, wherein m, n, andM are positive integers greater than or equal to 2, m is more than 2times of M, and N is a rounded up value obtained by dividing m by M.

A number of the plurality of regions is N, and the N groups of anodewires are respectively located in the N regions.

The N groups of anode wires at least include a first group of anodewires, a second group of anode wires, and a third group of anode wires,and the N regions at least include a first region, a second region and athird region. Orthographic projections of the first group of anodewires, the second group of anode wires and the third group of anodewires on the base substrate fall within a first region, a second regionand a third region, respectively, and orthographic projections of thefirst group of anode wires on the base substrate do not overlap with anorthographic projection of a lead wire in the lamp group on the basesubstrate.

Orthographic projections of the second group of anode wires on the basesubstrate overlap with orthographic projections of some of the pluralityof lead wires in the lamp group on the base substrate, and orthographicprojections of the third group of anode wires on the base substrateoverlap with orthographic projections of some others of the plurality oflead wires in the lamp group on the base substrate.

Some of the plurality of lead wires in the lamp group extend in a firstdirection, and some others of the plurality of lead wires in the lampgroup extend in a second direction, and the second direction intersectswith the first direction.

The plurality of cathode wires are divided into N−1 groups, and the N−1groups of cathode wires are arranged equidistantly on the base substrateat intervals.

FIG. 7A, FIG. 7B, and FIG. 7C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively. The embodiments shown in FIG. 7A to FIG. 7C aredirected to the lamp group in which the anode wire falls into the firstregion.

Referring to FIG. 7A, for a lamp group in which the anode wire fallsinto the first region, the cathode wire thereof may be located on theleft side. For example, in one lamp group 10, eight lead wires 4 in thelamp group are provided to connect 9 mini LED lamp beads 1 in series.Along a sequence of the series connection, the eight lead wires 4 in thelamp group may be respectively referred as a first lead wire 41 in thelamp group, a second lead wire 42 in the lamp group, a third lead wire43 in the lamp group, a fourth lead wire 44 in lamp group, a fifth leadwire 45 in the lamp group, a sixth lead wire 46 in the lamp group, aseventh lead wire 47 in the lamp group, and an eighth lead wire 48 inthe lamp group. An anode wire 2 is electrically connected with an anodeof a head lamp bead 1 through a via hole in an anode connection region21, and then electrically connected to a tail lamp bead 1 through thefirst lead wire in the lamp group, the second lead wire in the lampgroup, the third lead wire in the lamp group, the fourth lead wire inthe lamp group, the fifth lead wire in the lamp group, the sixth leadwire in the lamp group, the seventh lead wire in the lamp group and theeighth lead wire in the lamp group, and the tail lamp bead 1 iselectrically connected with a cathode wire 3 through a via hole locatedin a cathode connection region 31.

Orthographic projections of the first group of anode wires on the basesubstrate partially overlap with an orthographic projection of theeighth lead wire 48 in the lamp group on the base substrate.Orthographic projections of the second group of anode wires on the basesubstrate partially overlap with orthographic projections of the sixthlead wire 46 in the lamp group and the seventh lead wire 47 in the lampgroup on the base substrate. Orthographic projections of the third groupof anode wires on the base substrate partially overlap orthographicprojections of the second lead wire 42 in the lamp group, the third leadwire 43 in the lamp group, the fourth lead wire 44 in the lamp group andthe fifth lead wire 45 in the lamp group on the base substrate.Orthographic projections of the fourth group of anode wires on the basesubstrate do not overlap with orthographic projections of all the leadwires in the group on the base substrate. In this way, orthographicprojections of the same-type anode wires (e.g., A1/A7/A13/A19) on thebase substrate do not overlap with an orthographic projection of onesame lead wire in the lamp group on the base substrate.

As shown in FIG. 7A, some of the lead wires in the lamp group (forexample, the first lead wire 41 in the lamp group, the second lead wire42 in the lamp group, the fifth lead wire 45 in the lamp group and theseventh lead wire 47 in the lamp group) extend along the first direction(e.g., the row direction), and some of the lead wires of the lamp group(the third lead wire 43 in the lamp group, the fourth lead wire 44 inlamp group, the sixth lead wire 46 in the lamp group and the eighth leadwire 48 in the lamp group) extend in the second direction (e.g., thecolumn direction). Through such extension, it may be ensured thatorthographic projections of the same-type anode wires (e.g.A1/A7/A13/A19) on the base substrate do not overlap with theorthographic projection of one same lead wire in the same lamp group onthe base substrate.

Referring to FIG. 7B, for a lamp group in which the anode wire fallsinto the first region, the cathode wire thereof may be located in themiddle. The fourth lead wire 44 in the lamp group extends in an obliquedirection (relative to the row or column direction). By designing thelead wires in the lamp group, it may be realized that orthographicprojections of the same-type anode wires (e.g. A1/A7/A13/A19) on thebase substrate do not overlap with an orthographic projection of onesame lead wire in the lamp group on the base substrate.

Referring to FIG. 7C, for a lamp group in which the anode wire fallsinto the first region, the cathode wire thereof may be located on theright side.

FIG. 8A, FIG. 8B, and FIG. 8C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively, The embodiments shown in FIG. 8A to FIG. 8C aredirected to a lamp group in which the anode wire falls into the secondregion. Referring to FIG. 8A, for the lamp group in which the anode wirefalls into the second region, the cathode wire thereof may be located onthe left side. Referring to FIG. 8B, for the lamp group in which theanode wire falls into the second region, the cathode wire thereof may belocated in the middle. Referring to FIG. 8C, for the lamp group in whichthe anode wire falls into the second region, the cathode wire thereofmay be located on the right side.

FIG. 9A, FIG. 9B, and FIG. 9C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively. The embodiments shown in FIG. 9A to FIG. 9C aredirected to a lamp group in which the anode wire falls into the thirdregion. Referring to FIG. 9A, for the lamp group in which the anode wirefalls into the third region, the cathode wire thereof may be located onthe left side. Referring to FIG. 9B, for the lamp group in which theanode wire falls into the third region, the cathode wire thereof may belocated in the middle. Referring to FIG. 9C, for the lamp group in whichthe anode wire falls into the third region, the cathode wire thereof maybe located on the right side.

FIG. 10A, FIG. 10B, and FIG. 10C schematically show differentimplementations of anode wires, cathode wires, and lead wires in a lampgroup, respectively. The embodiments shown in FIG. 10A to FIG. 10C aredirected to the lamp group in which the anode wire falls into the fourthregion. Referring to FIG. 10A, for the lamp group in which the anodewire falls into the fourth region, the cathode wire thereof may belocated on the left side. Referring to FIG. 10B, for the lamp group inwhich the anode wire falls into the fourth region, the cathode wirethereof may be located in the middle. Referring to FIG. 10C, for thelamp group in which the anode wire falls into the fourth region, thecathode wire thereof may be located on the right side.

The embodiments described above may refer to the descriptions of FIG. 7a to FIG. 7C, which will not be repeated here.

For example, both the anode wire and the cathode wire extend in thefirst direction.

For example, a width of each of the plurality of lead wires in the lampgroup is larger than a width of each of the plurality of anode wires andthe plurality of cathode wires. In this way, it is beneficial to a heatdissipation of the mini LED lamp beads.

In the embodiments of the present disclosure, the orthographicprojections of the same-type anode wires (e.g., A1/A7/A13/A19) on thebase substrate do not overlap with the orthographic projection of onesame lead wire in the lamp group on the base substrate. Therefore,parasitic capacitance is not formed between the same-type anode wires.As shown in FIG. 11 , for the same-type anode wires A7 and A13 connectedto the same cathode wire K1, since there is no parasitic capacitancebetween the anode wire A7 and the anode wire A13, a capacitance voltagecaused by the parasitic capacitance is avoided. That is, a generation ofa parasitic voltage in the anode wire A13 is avoided, and an abnormallighting of the LED L13 may be avoided.

FIG. 12 is a partial enlarged view of a backlight module according tosome exemplary embodiments of the present disclosure. In the embodimentshown in FIG. 12 , orthographic projections of the same-type anode wireson the base substrate partially overlap with an orthographic projectionof one same lead wire in the lamp group on the base substrate, and thepartial overlap enables a parasitic capacitance voltage generated on thesame-type anode wires to be smaller than a threshold voltage of the lampgroup. That is, due to the partial overlap, a parasitic voltage may begenerated between the same-type anode wires (e.g., between A7 and A13 inFIG. 11 ). However, since an overlapping area is small enough, thegenerated parasitic voltage is small, which is less than the thresholdvoltage of the lamp group. In this way, an abnormal lighting of the LEDsmay also be avoided.

In the embodiments of the present disclosure, the following drivingtiming may be employed.

The integrated circuit 7 is connected to the cathode wires K1 to K6 oneby one, and non-connected cathode wires are in a high resistance state;at the same time, according to a pattern to be displayed/lightened,power is supplied to each of anode wires A1 to A24 sequentially. Forexample, a series of modulated square wave signals may be output in pWMmode to drive and lighten the LEDs.

The region where the lamp groups may be wired is divided into severalgroups. The same-type anode wires are respectively arranged in differentregions. Taking a 31.2-inch Mini LED backlight product as an example,the lamp group region may be divided into 4 (24/6) regions. Then, theplurality of lamp groups may be driven row by row without generating aparasitic voltage.

Some exemplary embodiments of the present disclosure further provide adisplay device.

The display device may be any product or component with a displayfunction. For example, the display device may be a smart phone, aportable phone, a navigation device, a television (TV), a car audiobody, a laptop computer, a tablet computer, a portable multimedia player(pMp), a personal digital assistant (pDA), etc.

It should be understood that the display device according to someexemplary embodiments of the present disclosure has all the features andadvantages of the backlight module described above, which may bereferred to the above descriptions of the light emitting substrate, andwill not be repeated here.

As used herein, the terms “substantially”, “about”, “approximately”, andother similar terms are used as terms of approximation rather than asterms of degree, and are intended to account for inherent deviations inmeasured or calculated values that would be recognized by those ofordinary skill in the art. Taking into account factors such as processfluctuations, measurement problems, errors associated with measurementof particular quantities (i.e., limitations of a measurement system),etc., “about” or “approximately” as used herein includes the statedvalues, and indicates that the particular values are within acceptabletolerances as determined by those of ordinary skill in the art. Forexample, “about” may mean within one or more standard deviations, orwithin ±10% or ±5% of the stated values.

Some embodiments of the general inventive concept of the presentdisclosure have been illustrated and described. However, those ofordinary skill in the art will appreciate that these embodiments may bechanged without departing from the principles and spirit of the generalinventive concept of the present disclosure. The scope of the presentdisclosure is defined by the claims and their equivalents.

1. A backlight module, comprising: a base substrate; a plurality of lampgroups arranged on the base substrate, wherein the plurality of lampgroups are arranged in an array on the base substrate, each lamp groupcomprises a plurality of mini light emitting diodes, a plurality of leadwires in the lamp group, an external anode and an external cathode, andthe plurality of lead wires in the lamp group are configured toelectrically connect the plurality of mini light emitting diodes inseries; a plurality of anode wires respectively electrically connectedto external anodes of a plurality of rows of lamp groups; and aplurality of cathode wires respectively electrically connected toexternal cathodes of a plurality of rows of lamp groups, wherein in atleast some of the plurality of cathode wires, one same cathode wire iselectrically connected to the external cathodes of the lamp groupslocated in different rows to provide, by means of time-divisionmultiplexing, cathode signals to the lamp groups located in differentrows; and same-wire lamp groups comprise a plurality of lamp groupselectrically connected to one same cathode wire, same-type anode wirescomprise a plurality of anode wires to which the same-wire lamp groupsare connected, and orthographic projections of the same-type anode wireson the base substrate do not overlap with an orthographic projection ofone same lead wire in the lamp group on the base substrate.
 2. Thebacklight module according to claim 1, wherein the plurality of cathodewires are arranged at intervals, the base substrate comprises aplurality of regions, and any two adjacent regions in the plurality ofregions are spaced apart by an orthographic projection of at least onecathode wire on the base substrate; the orthographic projections of thesame-type anode wires on the base substrate are located in differentregions of the plurality of regions, respectively.
 3. The backlightmodule according to claim 2, wherein the plurality of anode wirescomprise a plurality of groups of anode wires, and orthographicprojections of a plurality of anode wires in each group of anode wireson the base substrate fall within one same region of the plurality ofregions; a plurality of lamp groups to which each group of anode wiresis connected are electrically connected to different cathode wires,respectively.
 4. The backlight module according to claim 2 or 3, whereinthe plurality of lamp groups are arranged in an array of m rows and ncolumns on the base substrate; a number of the plurality of cathodewires is M, a number of the plurality of anode wires is m, a number ofthe plurality of groups of anode wires is N, wherein m, n, and M arepositive integers greater than or equal to 2, m is more than 2 times ofM, and N is a rounded up value obtained by dividing m by M.
 5. Thebacklight module according to claim 4, wherein a number of the pluralityof regions is N, and the N groups of anode wires are located in the Nregions, respectively.
 6. The backlight module according to claim 5,wherein the N groups of anode wires at least comprise a first group ofanode wires, a second group of anode wires, and a third group of anodewires, and the N regions at least comprise a first region, a secondregion and a third region, orthographic projections of the first groupof anode wires, the second group of anode wires and the third group ofanode wires on the base substrate fall within the first region, thesecond region and the third region, respectively, and orthographicprojections of the first group of anode wires on the base substrate donot overlap with orthographic projections of the lead wires in the lampgroup on the base substrate.
 7. The backlight module according to claim6, wherein orthographic projections of the second group of anode wireson the base substrate overlap with orthographic projections of some ofthe plurality of lead wires in the lamp group on the base substrate,orthographic projections of the third group of anode wires on the basesubstrate overlap with orthographic projections of some others of theplurality of lead wires in the lamp group on the base substrate.
 8. Thebacklight module according to claim 4, wherein the anode wires and thecathode wires extend along a first direction, some of the plurality oflead wires in the lamp group extend in the first direction, some othersof the plurality of lead wires in the lamp group extend in a seconddirection, and the second direction intersects with the first direction.9. The backlight module according to claim 4, wherein the plurality ofcathode wires are divided into N−1 groups, and the N−1 groups of cathodewires are arranged equidistantly on the base substrate at intervals. 10.The backlight module according to claim 8, wherein a width of each ofthe plurality of lead wires in the lamp group is larger than a width ofeach of the plurality of anode wires and the plurality of cathode wires.11. A backlight module, comprising: a base substrate; a plurality oflamp groups arranged on the base substrate, wherein the plurality oflamps are arranged in an array on the base substrate, and each lampgroup comprises a plurality of mini light emitting diodes, a pluralityof lead wires in the lamp group, an external anode and an externalcathode, and the plurality of lead wires in the lamp group areconfigured to electrically connect the plurality of mini light emittingdiodes in series; a plurality of anode wires respectively electricallyconnected to external anodes of a plurality of rows of lamp groups; anda plurality of cathode wires respectively electrically connected toexternal cathodes of a plurality of rows of lamp groups, wherein in atleast some of the plurality of cathode wires, one same cathode wire iselectrically connected to the external cathodes of lamp groups locatedin different rows to provide, by means of time-division multiplexing,cathode signals to the lamp groups located in different rows; andsame-wire lamp groups comprise a plurality of lamp groups electricallyconnected to one same cathode wire, same-type anode wires comprise aplurality of anode wires to which the same-wire lamp groups areconnected, orthographic projections of the same-type anode wires on thebase substrate partially overlap with an orthographic projection of onesame lead wires in the lamp group on the base substrate, and the partialoverlap enables a parasitic capacitance voltage generated on thesame-type anode wires to be smaller than a threshold voltage of the lampgroup.
 12. A display device, comprising the backlight module accordingto claim 1.